I am not sure if I am way off base here, but I recently purchased the newest installment of "One Piece: Pirate Warriors 2" which is a very new game and in several of Luffy's new attacks, his arm or leg lights on fire. I didn't think much of it until last week, Doflamingo revealed that he somehow has Ace's Devil Fruit. Whether it is artificial or not has not been established yet.
My question/theory is that somehow Luffy figures out how to consume a second Devil Fruit like Blackbeard did, which would be Ace's that he may steal/barter from Joker?
I know that it's such a small aspect of the game that I am making a big deal, but what are your thoughts here, and what would you think if that is what does happen?